The term functions as a complex noun phrase. It is a specific search query used to identify the actor who portrays the character named Dun Meng within the cast of the film Patriots Day. Grammatically, "Patriots Day" and "Dun Meng" act as modifiers specifying the particular member of the noun "cast."
In the 2016 film Patriots Day, the role of Dun Meng is portrayed by the actor Jimmy O. Yang. The character is based on the real-life individual of the same name who was carjacked by the Boston Marathon bombers, Tamerlan and Dzhokhar Tsarnaev. Meng's escape and subsequent call to the police were crucial in helping law enforcement locate the perpetrators' vehicle and ultimately apprehend them.
Therefore, the phrase connects a specific film production to an actor and the real-world historical figure they represent. The casting of Jimmy O. Yang highlights a pivotal moment in the manhunt, where the courageous actions of a civilian directly led to a breakthrough in a major counter-terrorism operation.
